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Symptoms
By Mayo Clinic staffBoth psoriatic arthritis and psoriasis are chronic diseases that get worse over time, but you may have periods when your symptoms improve or go into remission alternating with times when symptoms become worse.
Psoriatic arthritis can affect joints on just one side or on both sides of your body. The signs and symptoms of psoriatic arthritis often resemble those of rheumatoid arthritis. Both diseases cause joints to become painful, swollen and warm to the touch.
However, psoriatic arthritis is more likely to also cause:
- Swollen fingers and toes. Psoriatic arthritis can cause a painful, sausage-like swelling of your fingers and toes. You may also develop swelling and deformities in your hands and feet before having significant joint symptoms.
- Foot pain. Psoriatic arthritis can also cause pain at the points where tendons and ligaments attach to your bones — especially at the back of your heel (Achilles tendinitis) or in the sole of your foot (plantar fasciitis).
- Lower back pain. Some people develop a condition called spondylitis as a result of psoriatic arthritis. Spondylitis mainly causes inflammation of the joints between the vertebrae of your spine and in the joints between your spine and pelvis (sacroiliitis).
When to see a doctor
If you have psoriasis, be sure to tell your doctor if you develop joint pain. Psoriatic arthritis can come on suddenly or develop slowly, but in either case it can severely damage your joints if left untreated.
- Fitzgerald O. Psoriatic arthritis. In: Firestein GS, et al. Kelley's Textbook of Rheumatology. 8th ed. Philadelphia, Pa.: W.B. Saunders Co.; 2008. http://www.mdconsult.com/das/book/body/223128990-5/1070709009/1807/528.html#4-u1.0-B978-1-4160-3285-4..10072-5_2607. Accessed Oct. 19, 2010.
- Gladman DD. Clinical manifestations and diagnosis of psoriatic arthritis. http://www.uptodate.com/home/index.html. Accessed Oct. 19, 2010.
- Psoriatic arthritis. American College of Rheumatology. http://www.rheumatology.org/practice/clinical/patients/diseases_and_conditions/psoriaticarthritis.asp. Accessed Oct. 19, 2010.
- Kleinert S, et al. Psoriatic arthritis: Clinical spectrum and diagnostic procedures. Clinics in Dermatology. 2007;25:519.
- Gladman DD. Pathogenesis of psoriatic arthritis. http://www.uptodate.com/home/index.html. Accessed Oct. 19, 2010.
- Mercier LR. Arthritis, psoriatic. In: Ferri FF. Ferri's Clinical Advisor 2011. Philadelphia, Pa.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/page.do?sid=1070709009&eid=4-u1.0-B978-0-323-07158-1..00003-1--s2020&isbn=978-0-323-07158-1&type=bookPage§ionEid=4-u1.0-B978-0-323-07158-1..00003-1--s2020&uniqId=223128990-6. Accessed Oct. 19, 2010.
- Gladman DD. Treatment of psoriatic arthritis. http://www.uptodate.com/home/index.html. Accessed Oct. 19, 2010.
- Chang-Miller A (expert opinion). Mayo Clinic, Scottsdale, Ariz. Nov. 2, 2010.
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